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Summary of Contents for Microchip Technology MCP1642B
- Page 1 MCP1642B/D High-Current Synchronous Boost Converter Evaluation Board User’s Guide 2015 Microchip Technology Inc. DS50002353A...
- Page 2 WiperLock, Wireless DNA, and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. Silicon Storage Technology is a registered trademark of Microchip Technology Inc. in other countries.
- Page 3 Object of Declaration: MCP1642B/D High-Current Synchronous Boost Converter Evaluation Board 2015 Microchip Technology Inc. DS50002353A-page 3...
- Page 4 MCP1642B/D High-Current Synchronous Boost Converter Evaluation Board User’s Guide NOTES: 2015 Microchip Technology Inc. DS50002353A-page 4...
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Page 5: Table Of Contents
Chapter 1. Product Overview 1.1 Introduction ....................11 1.2 MCP1642B/D short overview ............... 11 1.3 What is the MCP1642B/D High-Current Synchronous Boost Converter Evaluation Board? .................. 12 1.4 Contents of the MCP1642B/D High-Current Synchronous Boost Converter Evaluation Board ..................12 Chapter 2. - Page 6 MCP1642B/D High-Current Synchronous Boost Converter Evaluation Board User’s Guide NOTES: 2015 Microchip Technology Inc. DS50002353A-page 6...
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Page 7: Preface
• The Microchip Web Site • Customer Support • Document Revision History DOCUMENT LAYOUT This document describes how to use the MCP1642B/D High-Current Synchronous Boost Converter Evaluation Board as a development tool. The manual layout is as follows: • – Important information about the MCP1642B/D Chapter 1. -
Page 8: Conventions Used In This Guide
MCP1642B/D High-Current Synchronous Boost Converter Evaluation Board User’s Guide CONVENTIONS USED IN THIS GUIDE This manual uses the following documentation conventions: DOCUMENTATION CONVENTIONS Description Represents Examples Arial font: ® Italic characters Referenced books MPLAB IDE User’s Guide Emphasized text ...is the only compiler... -
Page 9: Recommended Reading
Boost Converter Evaluation Board. Other useful documents are listed below. The following Microchip documents are available and recommended as supplemental reference resources. • MCP1642B/D Data Sheet – “1.8A Input Current Switch, 1 MHz Low-Voltage Start-Up Synchronous Boost Regulator” (DS20005253) THE MICROCHIP WEB SITE Microchip provides online support via our web site at www.microchip.com. - Page 10 MCP1642B/D High-Current Synchronous Boost Converter Evaluation Board User’s Guide NOTES: 2015 Microchip Technology Inc. DS50002353A-page 10...
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Page 11: Chapter 1. Product Overview
• Output Disconnect mode (MCP1642B) • Input-to-Output Bypass mode (MCP1642D) For the fixed output voltage option of the MCP1642B/D devices, the feedback pin (V is not connected. The output voltage is set by an internal feedback divider. The available fixed output values are 1.8V, 3.0V, 3.3V, 5V. -
Page 12: What Is The Mcp1642B/D High-Current Synchronous Boost Converter Evaluation Board
MCP1642B/D High-Current Synchronous Boost Converter Evaluation Board was developed to help engineers reduce the product design cycle time. The output voltage for the applications using MCP1642B/D-ADJ can be set using the external resistor divider. The converter can be disabled by tying the Enable pin (EN) to ground (GND). -
Page 13: Chapter 2. Installation And Operation
NiCd, NiMH, one-cell Li-Ion or Li-Polymer batteries. The MCP1642B/D is capable of regulating the output voltage over a wide 1.8V to 5.5V range and typically can deliver over 400 mA of load current at 3.3V output when supplied from a single 1.5V cell. -
Page 14: Battery Considerations
Ultimate Lithium batteries are an alter- native power solution that provides superior performance high drains and allows designers to utilize the full power range of the MCP1642B/D without sacrificing size or runtime. Energizer Ultimate Lithium batteries utilize a primary cell chemistry that contains higher energy than alkaline batteries and has much better high-drain performance. - Page 15 4.7 µH 3.3V 1V - 3.0V 10 µF 10 µF SELECT 4.7 µH 5.0V 1 - 4.5V 976 kΩ 10 µF 10 µF 5.1 kΩ 309 kΩ SELECT FIGURE 2-2: MCP1642B/D Synchronous Boost Applications. 2015 Microchip Technology Inc. DS50002353A-page 15...
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Page 16: Getting Started
Soldered test points are available to connect a load. The switch peak current limit will provide a safe maximum current value. The maximum output current for the converters will vary with input and output voltages; refer to Figure 2-1 or the MCP1642B/D data sheet for more information on the maximum output current. - Page 17 The resistor divider R and R is used to set the converter output voltage. The output voltage can be calculated using Equation 2-1. EQUATION 2-1: ------------ - – Where: = 1.21V 2015 Microchip Technology Inc. DS50002353A-page 17...
- Page 18 MCP1642B/D High-Current Synchronous Boost Converter Evaluation Board User’s Guide NOTES: 2015 Microchip Technology Inc. DS50002353A-page 18...
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Page 19: Appendix A. Schematic And Layouts
High-Current Low Start-up Voltage Synchronous Boost Converter Evaluation Board: • Board – Schematic • Board – Top Silk and Pads • Board – Top Copper and Silk • Board – Top Copper • Board – Bottom Copper 2015 Microchip Technology Inc. DS50002353A-page 19... -
Page 20: Board - Schematic
MCP1642B/D High-Current Synchronous Boost Converter Evaluation Board User’s Guide BOARD – SCHEMATIC 4.7uH 3.3V VIN1 VOUT CIN1 10uF COUT1 MCP1642B-33 MCP1642D-33 10uF 0805 0805 4.7uH COUT2 VIN2 VOUT 976k 10uF CIN2 0805 10uF 5.1k MCP1642B-ADJ 309k 0805 GND2 GND2 GND2... -
Page 21: Board - Top Silk And Pads
Schematic and Layouts BOARD – TOP SILK AND PADS 2015 Microchip Technology Inc. DS50002353A-page 21... -
Page 22: Board - Top Copper And Silk
MCP1642B/D High-Current Synchronous Boost Converter Evaluation Board User’s Guide BOARD – TOP COPPER AND SILK 2015 Microchip Technology Inc. DS50002353A-page 22... -
Page 23: Board - Top Copper
Schematic and Layouts BOARD – TOP COPPER 2015 Microchip Technology Inc. DS50002353A-page 23... -
Page 24: Board - Bottom Copper
MCP1642B/D High-Current Synchronous Boost Converter Evaluation Board User’s Guide BOARD – BOTTOM COPPER 2015 Microchip Technology Inc. DS50002353A-page 24... -
Page 25: Appendix B. Bill Of Materials (Bom)
MCHP ANALOG SWITCHER Microchip Technology Inc. MCP1642B-ADJI/MS Boost 5.0V MCP1642B-ADJ The components listed in this Bill of Materials are representative of the PCB assembly. The Note: released BOM used in manufacturing uses all RoHS-compliant components. 2015 Microchip Technology Inc. DS50002353A-page 25... - Page 26 MCP1642B/D High-Current Synchronous Boost Converter Evaluation Board User’s Guide NOTES: 2015 Microchip Technology Inc. DS50002353A-page 26...
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Page 27: Worldwide Sales And Service
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